Over the last 27 years, the USGS at Menlo Park, in collaboration with other
principal investigators, has collected an extensive low-frequency geophysical
data set that contains over 1300 channels of tilt, tensor strain, dilatational
strain, creep, magnetic field, water level, and auxiliary channels such as
temperature, pore pressure, rain and snow accumulation, and wind speed. In
collaboration with the USGS, we assembled the requisite information for the
hardware representation of the stations and the instrument responses for many
channels of this diverse dataset, and developed the required programs to
populate and update the hardware database and generate the instrument
responses. We developed the programs and procedures to automate the process
of importing the raw waveform data and convert it to MiniSEED format.

We have currently archived timeseries data from 887 data channels from 167
sites, and have instrument response information for 542 channels at 139 sites.
The waveform archive is updated on a daily basis with data from 350 currently
operating data channels. We will augment the raw data archive as additional
instrument response information is assembled by the USGS for the channels,
and will work with the USGS to clearly define the attributes of the ``processed"
data channels.